Registration Dossier

Environmental fate & pathways

Biodegradation in water: screening tests

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Administrative data

Endpoint:
biodegradation in water: ready biodegradability
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Guideline study obtained through inquiry process; SNIF file obtained from ECHA.

Data source

Reference
Reference Type:
other: SNIF
Title:
Unnamed
Year:
1997

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
EU Method C.4-C (Determination of the "Ready" Biodegradability - Carbon Dioxide Evolution Test)
Deviations:
not specified
GLP compliance:
yes

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
not specified

Study design

Oxygen conditions:
not specified
Inoculum or test system:
not specified
Duration of test (contact time):
28 d
Reference substance
Reference substance:
aniline

Results and discussion

% Degradation
Parameter:
% degradation (CO2 evolution)
Value:
0
Sampling time:
28 d
Details on results:
Points of degradation plot (test substance):
0 % degradation after 2 d
0 % degradation after 5 d
1.9 % degradation after 7 d
3.4 % degradation after 9 d
0.2 % degradation after 12 d
0.7 % degradation after 14 d
1 % degradation after 19 d
1.7 % degradation after 23 d
0 % degradation after 28 d

BOD5 / COD results

Results with reference substance:
Points of degradation plot (reference substance):
0 % degradation after 2 d
26 % degradation after 5 d
61.4 % degradation after 7 d
69.1 % degradation after 9 d
68.8 % degradation after 12 d
62.5 % degradation after 14 d
76.5 % degradation after 19 d
81.6 % degradation after 23 d
84.4 % degradation after 28 d

Applicant's summary and conclusion

Validity criteria fulfilled:
not specified
Interpretation of results:
under test conditions no biodegradation observed
Conclusions:
Degradation = 0 % after 28 days
Executive summary:

The test substance was not readily biodegradable (0% degradation after 28 d) in a GLP study according to EU Method C.4 -C (Modified Sturm Test).